Out-of-bounds read in PostgreSQL - CVE-2026-116333
Published: November 12, 2026
Vulnerability identifier: #VU166104
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116333
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information by reading server memory at chosen addresses.
The vulnerability exists due to an out-of-bounds read in PostgreSQL parallel B-tree scans when participating workers build different scan-key arrays. A remote user can use object-creation capabilities and a function incorrectly marked PARALLEL SAFE or STABLE to produce these differing arrays and read server memory at chosen addresses.
Affected software
PostgreSQL
How to mitigate CVE-2026-116333
Install security update from vendor's website.
PostgreSQL - addressed in versions 17.12, 18.7